Diaphragm pump



FIG. 1 is a perspective view of my new design of diaphragm pump;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a plane view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a cross-sectional view taken along the line 8—8 of FIG. 6.

It being understood that the broken lines are for illustrative purposes only. 

The ornamental design for a diaphragm pump, as shown and described. 